Peter Singer has been described as the world’s most influential philosopher. Born in Melbourne in 1946, he has been professor of bioethics at Princeton University since 1999. His many books include Animal Liberation - often credited with triggering the modern animal rights movement - Practical Ethics, The Life You Can Save, The Most Good You Can Do, and Ethics in the Real World. In 2023, he published Animal Liberation Now, a fully revised and updated version of the 1975 original.

Singer’s writings have also inspired the movement known as effective altruism, and he is the founder of the charity The Life You Can Save. In 2021 he was awarded the $1 million Berggruen Prize for Philosophy and Culture, which he donated to nonprofit organizations working for the causes he supports. In 2023 he received the Frontiers of Knowledge Prize for the Humanities, from the Spanish BBVA Foundation.